Improvement in butt-hinges



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B. r. BARKEmoF SAN FRANCISCO, cALiroRNIa Letters Patent No. 68,150,dated August 27, 1867;

IMPROVEMENT IN BUTT-HINGES.

'ro ALL WHoM rr MAY CONCERN:

Beit known that, I, B. F. BAKKER, of San Francisco, in thc county of SanFrancisco, and State of Cali fornia, have invented a new and usefulImprovement in Folding-Door Butt; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, which willenable others skilled in the art to make and use the same, referencebeing had to the accompanying drawings, forming part of thisspecification.

My invention relates to the peculiar manner in which a butthinge fordoors which open or swing both ways folds into itself, it being areversible rabbeted hinge; and the invention consists in forming a buttin such a manner that it shall be a three-leaf butt folding into itself,two of which placed together form a single butt working alternately asthe door swings back and forth from the centre, and also in the mannerof attachment of the butt to the door'and easing, and in the mnfllerattached to the same, as will beidescribed;

Figure 1 represents the butt attached to the door, with the door openand thrown buck, it being a vertical section through the line z x of g.2.

Figure 2 shows the butt as it appears with the door closed, with theplate lapped on to the door and casing.

Figure 3 shows a side view with one of the leaves folded. I

Figure 4 shows an edge view of the butt or the three leaves or parts ofwhich it is composed.

Figure 5 is a view of a plate which is attached to the door and casingagainst which the butt is placed.

Similar letters of reference indicate like parts: v

A represents a metallic plate, which is fitted to the edge of the doorand to the casing, as seen in fig. 5. There are holes for screws throughthis plate which correspond with the screw-holes through the butt, sothat the same screws fasten both plate and butt to the door or casing.The other Vholes through this plate, marked a, correspond with holes inthe edge of the do'or or casing, in which I place a small spiral spring,which is held in place by ascrew, the head of which is sunk in a pieceof gotta percha marked C, which projects through the plate suflcientlyfar to receive the concussion of' the door when it swings to the centre,mulling the sound occasioned by the door closing. The gutta-perchamuiiler is pressed out by the spiral spring. Other elastic substancesmay answer-the same purpose, and perhaps the4 spiral spring mightbe'dispensed with. The edges ofthe plate A are turned at right angles onto the sides of the door and casing, forming a handsome finish, as

seen in fig. 2. B is the butt itself; it is formed as seen in figs, 3and 4.4 'Iwo of them are placed side by side,

as seen in iig. .1, each butt folding into itself as the door closes,and acting alternately as the door swings either way from its centre.These butts act in connection with a spring and bracket attached 4totheA top ofthe door and easing, as seen in fig. 1, and for which I havealready received Letters Patentof the United States.

Having thus described my invention, what I claim'as new, and desiretosecure by Letters Patent, is

1. A'Ihe three-leaf folding butt constructed substantially as hereinshown and described, the t'wo forming a reversible hinge, and actingalternately, substantially as set forth. Y

2. I claim the plate A, in combination with the butt, substantially asdescribed.

3. I claim the muler, substantially as described, in combination withthe butt, as and for the purposes specified.

B. F. BARKER.

Witnesses:

WM. F. McNAMARA, ALEX. F. Ronan'rs.

